All chapters
Chemistry 5070 · Cambridge (CAIE) O Level
Blast Furnace
2 past-paper questions on Blast Furnace · examined 2020–2025.
20251 question
5070/12 · M/J · Q28 [1]Sign up to mark my answer →
The iron(III) oxide used in a blast furnace contains the impurity silicon(IV) oxide, SiO2. Which reaction removes the silicon(IV) oxide?
20201 question
5070/11 · M/J · Q28 [1]Sign up to mark my answer →
The equations show reactions taking place in the blast furnace. In which reaction is an acidic impurity, present in iron ore, removed?
Go Pro to download this chapter as a topical PDF and search by AI.
AI Examiner
Don't just read the solution — get your own answer marked
Write your answer to any Chemistry past-paper question, photograph it, and Learning DEN marks it like a real examiner — marks awarded, where you lost them, and your predicted grade. 3 free gradings to start.